Re: [PATCH 33/33] x86, pkeys: execute-only support

On 02/17/2016 02:17 PM, Andy Lutomirski wrote:

quoted

quoted

Is there a way to detect this feature's availability without userspace
having to set up a segv handler and attempting to read a
PROT_EXEC-only region? (i.e. cpu flag for protection keys, or a way to
check the protection to see if PROT_READ got added automatically,
etc?)

We could add an HWCAP.

I'll bite.  What's an HWCAP?

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